vfs_syscalls_12.c revision 1.2
1 /* $NetBSD: vfs_syscalls_12.c,v 1.2 1997/10/16 23:50:36 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * From: @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/namei.h> 46 #include <sys/filedesc.h> 47 #include <sys/kernel.h> 48 #include <sys/file.h> 49 #include <sys/stat.h> 50 #include <sys/socketvar.h> 51 #include <sys/vnode.h> 52 #include <sys/mount.h> 53 #include <sys/proc.h> 54 #include <sys/uio.h> 55 #include <sys/malloc.h> 56 #include <sys/dirent.h> 57 58 #include <sys/syscallargs.h> 59 60 static void cvtstat __P((struct stat *, struct stat12 *)); 61 62 /* 63 * Convert from an old to a new stat structure. 64 */ 65 static void 66 cvtstat(st, ost) 67 struct stat *st; 68 struct stat12 *ost; 69 { 70 71 ost->st_dev = st->st_dev; 72 ost->st_ino = st->st_ino; 73 ost->st_mode = st->st_mode; 74 ost->st_nlink = st->st_nlink; 75 if (st->st_nlink >= (1 << 15)) 76 ost->st_nlink = (1 << 15) - 1; 77 else 78 ost->st_nlink = st->st_nlink; 79 ost->st_uid = st->st_uid; 80 ost->st_gid = st->st_gid; 81 ost->st_rdev = st->st_rdev; 82 ost->st_size = st->st_size; 83 ost->st_atime = st->st_atime; 84 ost->st_mtime = st->st_mtime; 85 ost->st_ctime = st->st_ctime; 86 ost->st_blksize = st->st_blksize; 87 ost->st_blocks = st->st_blocks; 88 ost->st_flags = st->st_flags; 89 ost->st_gen = st->st_gen; 90 } 91 /* 92 * Read a block of directory entries in a file system independent format. 93 */ 94 int 95 compat_12_sys_getdirentries(p, v, retval) 96 struct proc *p; 97 void *v; 98 register_t *retval; 99 { 100 register struct compat_12_sys_getdirentries_args /* { 101 syscallarg(int) fd; 102 syscallarg(char *) buf; 103 syscallarg(u_int) count; 104 syscallarg(long *) basep; 105 } */ *uap = v; 106 struct file *fp; 107 int error, done; 108 long loff; 109 110 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 111 return error; 112 if ((fp->f_flag & FREAD) == 0) 113 return (EBADF); 114 115 loff = fp->f_offset; 116 117 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 118 SCARG(uap, count), &done, p, 0, 0); 119 120 error = copyout(&loff, SCARG(uap, basep), sizeof(long)); 121 *retval = done; 122 return error; 123 } 124 125 /* 126 * Get file status; this version follows links. 127 */ 128 /* ARGSUSED */ 129 int 130 compat_12_sys_stat(p, v, retval) 131 struct proc *p; 132 void *v; 133 register_t *retval; 134 { 135 register struct compat_12_sys_stat_args /* { 136 syscallarg(char *) path; 137 syscallarg(struct stat12 *) ub; 138 } */ *uap = v; 139 struct stat sb; 140 struct stat12 osb; 141 int error; 142 struct nameidata nd; 143 144 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 145 SCARG(uap, path), p); 146 if ((error = namei(&nd)) != 0) 147 return (error); 148 error = vn_stat(nd.ni_vp, &sb, p); 149 vput(nd.ni_vp); 150 if (error) 151 return (error); 152 cvtstat(&sb, &osb); 153 error = copyout((caddr_t)&osb, (caddr_t)SCARG(uap, ub), sizeof (osb)); 154 return (error); 155 } 156 157 158 /* 159 * Get file status; this version does not follow links. 160 */ 161 /* ARGSUSED */ 162 int 163 compat_12_sys_lstat(p, v, retval) 164 struct proc *p; 165 void *v; 166 register_t *retval; 167 { 168 register struct compat_12_sys_lstat_args /* { 169 syscallarg(char *) path; 170 syscallarg(struct stat12 *) ub; 171 } */ *uap = v; 172 struct stat sb; 173 struct stat12 osb; 174 int error; 175 struct nameidata nd; 176 177 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 178 SCARG(uap, path), p); 179 if ((error = namei(&nd)) != 0) 180 return (error); 181 error = vn_stat(nd.ni_vp, &sb, p); 182 vput(nd.ni_vp); 183 if (error) 184 return (error); 185 cvtstat(&sb, &osb); 186 error = copyout(&osb, SCARG(uap, ub), sizeof (osb)); 187 return (error); 188 } 189 190 191 /* 192 * Return status information about a file descriptor. 193 */ 194 /* ARGSUSED */ 195 int 196 compat_12_sys_fstat(p, v, retval) 197 struct proc *p; 198 void *v; 199 register_t *retval; 200 { 201 register struct compat_12_sys_fstat_args /* { 202 syscallarg(int) fd; 203 syscallarg(struct stat12 *) sb; 204 } */ *uap = v; 205 int fd = SCARG(uap, fd); 206 register struct filedesc *fdp = p->p_fd; 207 register struct file *fp; 208 struct stat ub; 209 struct stat12 oub; 210 int error; 211 212 if ((u_int)fd >= fdp->fd_nfiles || 213 (fp = fdp->fd_ofiles[fd]) == NULL) 214 return (EBADF); 215 switch (fp->f_type) { 216 217 case DTYPE_VNODE: 218 error = vn_stat((struct vnode *)fp->f_data, &ub, p); 219 break; 220 221 case DTYPE_SOCKET: 222 error = soo_stat((struct socket *)fp->f_data, &ub); 223 break; 224 225 default: 226 panic("compat_12_sys_fstat"); 227 /*NOTREACHED*/ 228 } 229 cvtstat(&ub, &oub); 230 if (error == 0) 231 error = copyout((caddr_t)&oub, (caddr_t)SCARG(uap, sb), 232 sizeof (oub)); 233 return (error); 234 } 235
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